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Use the interactive map below to check population changes. Zoom in to see where Podocnemis unilfilis is Endangered based on IUCN Redlist criteria - A3bd.

This is an extension of Norris et al 2019 that includes:

  • stochastic population projections
  • threats caused by human acessibility (hunting and habitat change) and actions that reduce river connectivity.

Due to the number of points, the map can become slow to respond when you zoom in. Zoom out to a level showing fewer points and you can pan around the map to find the area of interest. Then zoom in again to check the coloured points.

When you zoom in you will see shaded points. Points are brown where populations are expected to decline by 50% or more within 3 generations (42 years). Brown points therefore represent rivers where the species is Endangered, following the IUCN Redlist criteria - A3bd.

A summary of the results is presented below. Summaries by country and major basin. Summary by country.

Country Endangered (prop) river length (km) length End. length not End.
Bolivia 0.91 18739 17098 1641
Brazil 0.75 123498 92740 30758
Colombia 0.62 18037 11266 6771
Ecuador 0.95 3330 3176 154
French Guiana 0.76 1833 1390 443
Guyana 0.70 4675 3272 1403
Peru 0.91 23447 21304 2143
Suriname 0.54 3908 2103 1805
Venezuela 0.69 18382 12623 5759

Summary by basin.

Basin Endangered (prop) river length (km) length End. length not End.
Amazon 0.77 170905 131958 38947
Coastal North 0.68 12700 8626 4074
Coastal South 1.00 5711 5711 0
Orinoco 0.70 26533 18677 7856

Summary by major basins and countries.

#> `summarise()` has grouped output by 'BASIN_N'. You can override using the
#> `.groups` argument.
Basin Country Endangered (prop) river length (km) length End. length not End.
Amazon Bolivia 0.91 18739 17098 1641
Amazon Brazil 0.74 116106 85750 30356
Amazon Colombia 0.54 7769 4229 3540
Amazon Ecuador 0.95 3330 3176 154
Amazon Guyana 1.00 299 299 0
Amazon Peru 0.91 23447 21304 2143
Amazon Venezuela 0.08 1215 102 1113
Coastal North Brazil 0.76 1681 1279 402
Coastal North French Guiana 0.76 1833 1390 443
Coastal North Guyana 0.68 4376 2973 1403
Coastal North Suriname 0.54 3908 2103 1805
Coastal North Venezuela 0.98 902 881 21
Coastal South Brazil 1.00 5711 5711 0
Orinoco Colombia 0.69 10268 7037 3231
Orinoco Venezuela 0.72 16265 11640 4625

Next steps